Sealing means, kit and method for sealing of hollow hoses of flexible material

ABSTRACT

The present invention relates to sealing means made of a plastically deformable material for mechanical sealing of hollow hoses ( 2 ) of elastic material by means of an appliance having at least two jaws, at least one of which is movable towards and away from the other and which, when moving towards each other, crimp the sealing means against the hose ( 2 ) for contamination-tight sealing of the same, the sealing means ( 20 ) comprises at least one sealing member ( 4, 4′; 44, 44′; 64, 64′; 74, 74′; 84 ), which has two opposite ends and an opening ( 40, 40 ′) that extends between said ends to allow the at least one sealing member to be slipped onto the hose ( 2 ) to be sealed. 
     The present invention also relates to a kit comprising a sealing means and an appliance for sealing of hollow hoses and to a method for mechanical sealing of hollow hoses.

TECHNICAL FIELD

The present invention relates to a sealing means made of a plasticallydeformable material for mechanical sealing of hollow hoses of elasticmaterial by means of an appliance having at least two jaws, at least oneof which is movable towards and away from the other and which, whenmoving towards each other, crimp the sealing means against the hose forcontamination-tight sealing of the same. The present invention alsorelates to a kit comprising a sealing means and an appliance for sealingof hollow hoses and to a method for mechanical sealing of hollow hoses.

BACKGROUND OF THE INVENTION

In, for example, devices for introduction and/or withdrawal of a mediumin a container there is a need for contamination-free sealing andcutting of the hoses that extend between the conveying means and thecollecting vessels which are connected to the process container. Thereason for this is that it is desirable that the collecting vessels,after being filled with a medium from the process container, can bemoved without any risk of contamination to a laboratory or the like forsampling or analysis of the medium. In the above application, therequirements for good hygienic conditions and contamination-freeenvironment/surroundings are exacting.

Solutions for sealing a hose are previously known in the art, forinstance in the form of a folded clip, which is applied to a folded endof the hose. The clip is then crimped against the hose for sealing ofthe same, whereupon the hose is cut downstream of the clip by means of apair of scissors or some other cutting tool. However, a solution of thiskind does not satisfy the requirements for good hygienic conditions andcontamination-free sealing referred to in the application describedabove. For example the clips do not always provide the desired sealingeffect and there is in most cases at least a small portion of the hoseleft downstream of the clip. There might even be a small portion of thehose left downstream of the clip on both of the cut hose ends. This hoseportion or hose portions contain a small quantity of the medium, whichmay leak out to the surrounding area with an obvious risk ofcontamination.

Solutions to the above problem have been suggested in, for example, EP 1090 281, which is owned by the present applicant and which discloses anappliance for sealing a sleeve that has been preassembled around a hosein a contamination-free manner.

A problem associated with this solution, however, is that during storagethe material of the preassembled sleeves may crack due to stresscorrosion, a consequence of which may be that the desiredcontamination-free sealing of the hose is not obtained. There is thus aneed for a solution that eliminates this problem.

SUMMARY OF THE INVENTION

According to a first aspect of the present invention, the above problemcan be eliminated by a sealing means of the kind defined in claim 1.Said sealing means is made of a plastically deformable material formechanical sealing of hollow hoses of elastic material by means of anappliance having at least two jaws, at least one of which is movabletowards and away from the other and which, when moving towards eachother, crimp the sealing means against the hose for contamination-tightsealing of the same, wherein the sealing means comprises at least onesealing member, which has two opposite ends and an opening that extendsbetween said ends to allow the at least one sealing member to be slippedonto the hose to be sealed.

Hoses that are to be sealed in a contamination-free manner are oftenprovided with components at their ends, such as a bag for collectingsample liquid or a coupling for connecting the hose to a vessel fromwhich a sample is to be taken. As a rule the components have a size thatis greater than the diameter of the hose and because of these componentsit is therefore often not possible to mount a complete sleeve around thehose afterwards. To obtain a satisfactory contamination-free seal withthe kind of sealing means that is crimped against the hose to be sealed,it is also important that the dimension of the sealing means, forexample a sleeve, is not too great in proportion to the hose to besealed. This means that it will be difficult to slip a sleeve withdimensions that are appropriate for satisfactory sealing of the hoseonto the hose and move it along the hose, even if the hose has nocomponents at its ends.

Owing to its design, a sealing means as described by way ofintroduction, which is configured of at least one sealing member, whichis provided with a longitudinal opening to allow it to be slipped ontothe hose, can be applied around the hose even if the hose is providedwith components at its ends. And by applying the at least one sealingmember to the hose from the side of the hose, i.e. in a directiontransversely of the longitudinal direction of the hose, there is no needto move it along the hose during mounting. This makes it easier for auser to apply the sealing member to the hose and position it at adesired location along the hose.

In other words, the above-described at least one sealing member may bearranged around the hose to be sealed just before sealing is to takeplace. This means that the sealing means does not have to be applied tothe hose in conjunction with the manufacturing of the product, nor doesit need to be stored with the hose. As a result the risk of corrosioncracks appearing in the sealing means is reduced. A further advantage isthat even if corrosion cracks were to appear in a sealing means, thereis no need to discard the whole product, i.e. the hose and itscomponents. Instead another, undamaged sealing means may be applied tothe hose.

As mentioned above, a further advantage of the present invention is thatthe sealing means can be arranged at any optional location along thehose. This distinguishes it from prior art, in which preassembledsleeves were arranged on the hose. The fact that the person who is toseal and cut the hose is able to choose where to dispose the seal isadvantageous from the user's point of view.

The at least one sealing member is suitably arranged so as to provide acertain flexibility. This may be achieved, for instance, by selecting anappropriate material and/or appropriate material thickness for thesealing member. Furthermore, it may not be necessary to provide theentire at least one sealing member with flexible characteristics.Instead, it may also be achieved by providing the at least one sealingmember with a zone of appropriate material and/or appropriate materialthickness. This allows the at least one sealing member to be stretchedout when arranging it about the hose and once disposed around the hoseit is able to assume its initial shape, which means that a tight fitbetween the sealing member and the hose can be obtained. Because the atleast one sealing member has a certain flexibility, it is also possibleto use the same sealing member for hoses of slightly varying diameter.

According to an exemplary embodiment, the sealing means being configuredsuch that a portion of said sealing means overlap a correspondingportion of said sealing means when said sealing means is arranged aroundthe hose to be sealed.

In an embodiment where the sealing means comprises one sealing memberwith a longitudinal opening extending between its sides, it is theportions of the sealing member that is adjacent the opening, on eachside of the opening, that may be provided to overlap each other when thesealing member is arranged around the hose to be sealed.

In an embodiment where the sealing means comprises at least two sealingmembers, the sealing means may be configured such that a portion of onesealing member, adjacent the opening of that sealing member, may overlapa corresponding portion of another sealing member, wherein thecorresponding portion is adjacent the opening of that sealing member.

By arranging the sealing means with an overlap, a sealing means isprovided which is applied to the hose in an appropriately tight mannerand which, thus, enables a contamination-free sealing thereof.Furthermore, by providing the sealing means in an overlapping manner, itis ensured that the sealing means cover the entire circumference of thehose, which is beneficial when attempting to obtain a contamination-freesealing of the hose.

As mentioned above, because of the certain flexibility of the at leastone sealing member, it is also possible to use the same sealing memberfor hoses of slightly varying diameter. This feature is further enhancedby the fact that the sealing members are adapted to be arranged with acertain overlap relative to each other. The length of the overlap mayvary slightly, which too facilitates the use of the same sealing meansfor hoses of slightly varying size.

According to an exemplary embodiment, said sealing member being adaptedsuch that the portion of the sealing member that border the opening ofsaid sealing member overlap the corresponding portion that border saidopening when the sealing member is arranged around the hose to besealed.

In this embodiment, a sealing means consisting of one sealing member isused. The sealing member is preferably provided with a flexibility thatmakes it possible to stretch out the opening of the sealing member, in aradial direction of the sealing member. This flexibility makes itpossible to arrange the sealing member at the hose to be sealed. Oncethe sealing member is provided around the hose, the portions adjacentthe opening may be provided so that they overlap each other.

According to an exemplary embodiment, a surface extending between afirst side and a second side of said opening of said sealing memberspans 361-390° of a circle circumscribing said sealing member when saidsealing member is arranged around the hose to be sealed, and morepreferably spans 370-390° of a circle circumscribing said sealing memberwhen said sealing member is arranged around the hose to be sealed.

The above-mentioned ranges has proven to be beneficial in terms ofproviding a sufficient overlap of the portions of the sealing memberthat is provided adjacent the opening of the sealing member. Asmentioned above, by making the sealing member somewhat flexible makes itpossible to stretch out the opening in a radial direction when applyingit to the hose. Thereafter, the sealing member may be provided in aposition with an overlap within the above-mentioned ranges.

According to one exemplary embodiment, the sealing means comprises atleast two sealing members, each of which has two opposite ends and anopening that extends between said ends to allow the sealing members tobe slipped onto the hose to be sealed, the sealing members being adaptedsuch that the portions of a first sealing member that border the openingof said sealing member overlap corresponding portions of a secondsealing member when the sealing members are arranged around the hose tobe sealed.

As mentioned above, hoses that are to be sealed in a contamination-freemanner are often provided with components at their ends, such as a bagfor collecting sample liquid or a coupling for connecting the hose to avessel from which a sample is to be taken. To obtain a satisfactorycontamination-free seal with the kind of sealing means that is crimpedagainst the hose to be sealed, it is also important that the dimensionof the sealing means, for example a sleeve, is not too great inproportion to the hose to be sealed.

Owing to its design, a sealing means which is configured with twosealing members, each of which is provided with a longitudinal openingto allow them to be slipped onto the hose and then arranged with anoverlap, can be applied around the hose even if the hose is providedwith components at its ends. And by applying the sealing members to thehose from the side of the hose, i.e. in a direction transversely of thelongitudinal direction of the hose, there is no need to move them alongthe hose during mounting. This makes it easier for a user to apply thesealing members to the hose and position them at a desired locationalong the hose. By subsequently arranging the sealing members with anoverlap relative to each other, a sealing means is provided which isapplied to the hose in an appropriately tight manner and which, thus,enables a contamination-free sealing thereof.

In other words, the above sealing members may be arranged around thehose to be sealed just before sealing is to take place. This means thatthe sealing members does not have to be applied to the hose inconjunction with the manufacturing of the product, nor does it need tobe stored with the hose. As a result the risk of corrosion cracksappearing in the sealing means is reduced. A further advantage is thateven if corrosion cracks were to appear in a sealing means, there is noneed to discard the whole product, i.e. the hose and its components.Instead other, undamaged sealing members may be applied to the hose.

The sealing members are suitably arranged so as to provide a certainflexibility. This may be achieved, for instance, by selecting anappropriate material and/or appropriate material thickness for thesealing members. This allows a slight deflection of the sealing memberswhen arranging them about the hose and once disposed around the hosethey are able to assume their initial shape, which means that a tightfit between the sealing member and the hose can be obtained. Because thesealing members have a certain flexibility, it is also possible to usethe same sealing members for hoses of slightly varying diameter. Thisfeature is further enhanced by the fact that the sealing members areadapted to be arranged with a certain overlap relative to each other.The length of the overlap on the respective sides of the sleeves mayvary slightly, which too facilitates the use of the same sealing meansfor hoses of slightly varying size.

According to an alternative embodiment, each sealing member consists ofa substantially cylindrical element with opposite ends and with anopening that extends between said ends to allow application to the hose.

The above sealing members can be described as having the shape of acylinder segment. By this is meant that they have the shape of acylinder with part of the cylindrical surface having been cut away sothat a segment of the cylinder remains, i.e. the opening mentioned aboveextends from one short side of the cylinder along the cylindricalsurface to the other end of the cylinder. The two sealing members in theform of cylinder segments together span more than 360 degrees, so thatwhen they are arranged around the hollow hose to be sealed they arepositioned with an overlap between adjacent sealing members.

According to an alternative embodiment, a surface extending between afirst side and a second side of said opening of at least one of saidsealing member spans 180-350° of a circle circumscribing said sealingmember. Thus, in an alternative embodiment in which the sealing memberhas the shape of a cylinder with an imaginary portion cut away so as toform said opening, it is the remaining portion of the cylindricalsurface that is able to span 180-350°. This means that an imaginarycircular arc of the opening spans 10-180°. In other alternativeembodiments, the sealing members may have other shapes than parts ofcylinders, in which case the above-stated sizes of respectively theopening and the surface extending between the openings are to beunderstood as if the sealing member were inscribed in a circle.

According to an alternative embodiment, said surface extending between afirst side and a second side of said opening of at least one of saidsealing members spans 230-270° of a circle circumscribing said sealingmembers. Thus, in an alternative embodiment in which the sealing memberhas the shape of a cylinder with an imaginary portion cut away so as toform said opening, it is the remaining portion of the cylindricalsurface that is able to span 230-270°. This means that an imaginarycircular arc of the opening spans 90-130°. In other alternativeembodiments, the sealing members may have other shapes than parts ofcylinders, in which case the above-stated sizes of respectively theopening and the surface extending between the openings are to beunderstood as if the sealing member were inscribed in a circle.

An opening within the ranges stated above has been found to give asealing member which has a sufficiently large opening for enabling auser to dispose the sealing member around a hose in a simple manner,while at the same time the opening is not so large that the desiredoverlap is not obtained.

It is not necessary for both sealing members to have openings of thesame size, since the desired overlap can be achieved by having one ofthe sealing members span a greater part of the circumference of the hosethan the other sealing member.

According to an alternative embodiment, a surface extending between afirst side and a second side of said opening of each of said sealingmembers spans 181-350° of a circle circumscribing said sealing members.Thus, in an alternative embodiment in which the sealing member has theshape of a cylinder with an imaginary portion cut away so as to formsaid opening, it is the remaining portion of the cylindrical surfacethat is able to span 181-350°. This means that an imaginary circular arcof the opening spans 10-179°. In other alternative embodiments, thesealing members may have other shapes than parts of cylinders, in whichcase the above-stated sizes of respectively the opening and the surfaceextending between the openings are to be understood as if the sealingmember were inscribed in a circle.

According to an alternative embodiment, a surface extending between afirst side and a second side of said opening of each of said sealingmembers spans 230-270° of a circle circumscribing said sealing members.

Thus, in an alternative embodiment in which the sealing member has theshape of a cylinder with an imaginary portion cut away so as to formsaid opening, it is the remaining portion of the cylindrical surfacethat is able to span 230-270°. This means that an imaginary circular arcof the opening spans 90-130°. In other alternative embodiments, thesealing members may have other shapes than parts of cylinders, in whichcase the above-stated sizes of respectively the opening and the surfaceextending between the openings are to be understood as if the sealingmember were inscribed in a circle.

An opening within the ranges stated above has been found to give asealing member which has a sufficiently large opening for enabling auser to dispose the sealing member around a hose in a simple manner,while at the same time the opening is not so large that the desiredoverlap is not obtained. If the sealing members have openings of thesame size, the total surface of the sealing members suitably spans morethan 360°, so that it is possible to achieve an overlap between thesealing members when they are arranged around a hose.

According to an alternative embodiment, at least one of said sealingmembers is provided with positioning means for positioning said sealingmembers at a desired position relative to one another when disposedaround the hose to be sealed.

By providing at least one of said sealing members with positioning meanswhich make it easier for a user to arrange the at least two sealingmembers in the desired position relative to one another, the risk ofsaid at least two sealing members not being positioned with the desiredoverlap is reduced. The positioning means may be designed in a number ofalternative ways and yet provide the desired effect, which is toindicate to a user that the positioning means are positioned with thedesired overlap relative to each other. Furthermore, the positioningmeans may be designed such that they help to lock said at least twosealing members in the desired relative position to prevent them frommoving after they have been arranged in the desired position.

According to an alternative embodiment, at least one of said sealingmembers is provided with a bent portion, the bent portion extendingoutwards from the surface of the sealing member and being configuredsuch that an edge around the opening of said second sealing member abutsagainst said bent portion when said first and second sealing members arepositioned with the desired overlap around the hose to be sealed.

A positioning means which is designed in this manner will indicate to auser that the sealing members are located in the desired relativepositions while contributing to securing or fixing the sealing membersin these positions.

According to an alternative embodiment, at least one of said sealingmembers is provided with a bent portion, the bent portion extending in adirection inwards from the surface of the sealing member and beingconfigured such that an edge around the opening of said second sealingmember abuts against said bent portion when said first and secondsealing members are positioned with the desired overlap around the hoseto be sealed.

According to an alternative embodiment, at least one of said sealingmembers is provided with slots in the surface of the sealing member,which are arranged such that a portion of the surface of the sealingmember has the form of a flap, said flap being bent so as to extendinwards from the surface of the sealing member and being configured suchthat an edge around the opening of said second sealing member abutsagainst said bent portion when said first and second sealing members arepositioned with the desired overlap around the hose to be sealed.

According to an alternative embodiment, each of said sealing members isprovided with positioning means. The positioning means are adapted tocooperate to position and hold the sealing members, so that after theyhave been brought into the desired overlap around a hose they aremaintained in this position.

According to an alternative embodiment, the sealing means are adaptedsuch that said overlap between the sealing members, when arranged aroundthe hose to be sealed, has a length that exceeds the material thicknessof said sealing members.

This design offers a sealing means which in use ensures a desiredoverlap between the sealing members forming the sealing means, whichcontributes to achieving a satisfactory, contamination-free sealing of ahose when crimping the sealing means. By overlap length is meant itsextent from the edge of the opening of one of the sealing members, i.e.its extent in a direction transversely of the longitudinal extension ofthe sealing member.

According to an alternative embodiment, said sealing members are adaptedsuch that when arranged around said hollow hose they are positionedrelative to one another in such a manner that the portions of the firstsealing member that border the opening of said sealing member overlapcorresponding portions of an adjoining sealing member, the overlap onthe respective sides of said opening having a length that exceeds thematerial thickness of said sealing members.

The sealing members are suitably arranged such that an overlap betweenthe sealing members is achieved on the respective sides of the openingof each of the sealing members. However, the overlap need not be thesame on each side of the openings of the sealing members.

When the sealing means is provided with positioning means according tocertain exemplifying embodiments, the positioning means may be arrangedsuch that the sealing members are positioned relative to each other insuch a manner that the overlap on the respective sides of said openinghas a length that exceeds the material thickness of said sealingmembers. Moreover, the positioning means may be arranged such that theoverlap on both sides of the opening of each of the sealing members issubstantially the same.

According to a second aspect of the present invention, a kit formechanical sealing of hollow hoses of elastic material is furtherprovided, the kit comprising a sealing means according to any one of theexemplifying embodiments described above and an appliance having atleast two jaws, at least one of which is movable towards and away fromthe other and which, when moving towards each other, crimp the sealingmeans against the hose for contamination-tight sealing of the same,wherein at least one of the jaws of the appliance has at least one bar,which projects towards the other jaw and which, when the jaws are movingtowards each other, makes an indentation in the sealing means and in thehose to reinforce the sealing thereof as well as the fixing of thesleeve on the hose, and wherein at least one of the jaws has a cuttingmeans, which projects towards the other jaw and which, when the jaws aremoving towards each other, makes a cutting indication in the sealingmeans and in the hose to allow the hose to be cut in a sealing manner.

A set or a kit as described above makes it possible for a user to effecta contamination-free sealing of a hose in such a manner that the problemof preassembled sleeves which may be damaged during storage iseliminated.

According to an exemplifying embodiment of the appliance, the appliancehas two straight bars, which are placed substantially in parallel at adistance from each other and extend substantially transversely of thelongitudinal direction of the sleeve for making a corresponding numberof substantially transverse indentations in the sleeve and in the hose.The transverse indentations may reinforce the sealing thereof as well asthe fixing of the sealing members on the hose.

According to an exemplifying embodiment of the appliance, the cuttingedge of the appliance extends substantially transversely of thelongitudinal direction of the sleeve and makes a substantiallytransverse cutting indication in the sleeve and in the hose.

According to an exemplifying embodiment of the appliance, the cuttingedge of the appliance may be formed as a substantially straight cuttingedge, which projects to a greater extent than the bar or bars.

According to an exemplifying embodiment of the appliance, the cuttingedge of the appliance cooperates with an opposite recess in the otherjaw of the appliance.

According to an exemplifying embodiment of the appliance, the cuttingedge is situated substantially halfway between two adjacent bars.

According to an exemplifying embodiment of the appliance, the cuttingedge is situated on one side of the bar or bars.

According to an exemplifying embodiment of the appliance, at least oneof the jaws has a fixture for fixing the sleeve and the hose between thejaws.

According to an exemplifying embodiment of the appliance, the bar orbars and the cutting edge are arranged on one of the jaws and thefixture on the other jaw, the bar or bars, the cutting edge and thefixture being mounted on or made in one piece with the associated jaw.

According to an exemplifying embodiment of the appliance, the jawprovided with the bar or bars and the cutting edge has the form of adie, which is fixedly mounted in the appliance and the jaw provided withthe fixture has the form of a punch, which is mounted in a movablemanner in the appliance and is actuatable by a driving means.

According to an exemplifying embodiment of the appliance, the appliancehas the form of a pair of tongs which is hand-operated and which has onefixed and one movable leg.

According to an exemplifying embodiment of the appliance, the movableleg actuates, via a gear mechanism forming the driving means, preferablyan eccentric mechanism or the like, the jaw forming the punch.

According to an exemplifying embodiment of the appliance, the appliancemay be provided with positioning means, which contribute to arrangingthe sealing means in a desired position in the appliance. This may beadvantageous since it may make it easier for a user to make indentationsand/or a cut in the sealing members at a desired position.

According to an exemplifying embodiment, the length of the sealing meansmay be adapted to facilitate the desired sealing, i.e. the sealing meansmay have a length such that it is easy for a user to position it in theappliance in such a manner that the bars of the appliance and thecutting edge make contact with the sealing means.

According to a third aspect of the invention, a method for mechanicalsealing of hollow hoses by means of an appliance having at least twojaws, at least one of which is movable towards and away from each other,is provided. The method comprising the steps of

providing a sealing means made of a plastically deformable material, thesealing means comprising at least one sealing member, which has twoopposite ends and an opening that extends between said ends;

arranging the sealing means on the hose to be sealed in such a mannerthat a portion of the sealing means overlap a corresponding portion ofthe sealing means;

crimping the sealing means against the hose by means of said appliancefor contamination-tight sealing.

As mentioned above, hoses that are to be sealed in a contamination-freemanner are often provided with components at their ends, such as a bagfor collecting sample liquid or a coupling for connecting the hose to avessel from which a sample is to be taken. As a rule the components havea size that is greater than the diameter of the hose and because ofthese components it is therefore often not possible to mount a completesleeve around the hose afterwards. To obtain a satisfactory,contamination-free seal with the kind of sealing means that is crimpedagainst the hose to be sealed, it is also important that the dimensionof the sealing means, for example a sleeve, is not too great inproportion to the hose to be sealed. This means that it will bedifficult to slip a sleeve with dimensions that are appropriate forsatisfactory sealing of the hose onto the hose and move it along thehose, even if the hose has no components at its ends.

Nevertheless, it is possible to apply a sealing means comprising atleast one sealing member which comprises a longitudinal opening, to thehose and subsequently arrange it in an overlapping manner, even if thehose has components at its ends. And by applying the sealing means tothe hose from the side of the hose, i.e. in a direction transversely ofthe longitudinal direction of the hose, there is no need to move italong the hose during mounting. This makes it possible for a user toapply the sealing means to the hose and position it at a desiredlocation along the hose. By subsequently arranging the sealing memberwith an overlap, a sealing means is provided which is applied to thehose in an appropriately tight manner and which, thus, enables acontamination-free sealing thereof. Hence, it is possible to carry outthe steps of the above method in rapid succession, i.e. the sealingmeans does not have to be arranged on the hose or, possibly, stored withthe hose a long time before being crimped against the hose. As a resultthe risk of corrosion cracks appearing in the sealing means is reduced.A further advantage is that even if corrosion cracks were to appear in asealing means, there is no need to discard the whole product, i.e. thehose and its components. Instead another, undamaged sealing means may beapplied to the hose.

In an embodiment where the sealing means comprises one sealing memberwith a longitudinal opening extending between its sides, it is theportions of the sealing member that is adjacent the opening, on eachside of the opening, that may be provided to overlap each other when thesealing member is arranged around the hose to be sealed.

According to an exemplary embodiment, said method for mechanical sealingof hollow hoses further comprises

providing a sealing means comprising two sealing members, each of whichhas two opposite ends and an opening that extend between said ends,

arranging the respective sealing members on the hose to be sealed,

positioning the sealing members around the hose such that the portionsof a first sealing member that border said opening overlap therespective corresponding portions of a second sealing member.

In an embodiment where the sealing means comprises two sealing members,they may be arranged around the hose in such a manner that portions ofone of the sealing members, adjacent the opening of that sealing member,overlap corresponding portions of the other sealing member, i.e.portions adjacent the opening of that sealing member.

According to an exemplifying embodiment, the positioning of said sealingmembers comprises positioning the sealing members such that an edge ofone of said sealing members overlaps an edge of an adjacent sealingmember with a length that exceeds the material thickness of said sealingmembers.

According to an exemplifying embodiment in which the sealing meanscomprises one sealing member, the positioning of said sealing membercomprises positioning said sealing member such that an overlap spans1-30° of an imaginary circle circumscribing said hose, and morepreferably spans 10-30° of an imaginary circle circumscribing said hose.

It has been found to be advantageous to position the sealing member orsealing members with an overlap as described above, since this offers asatisfactory, contamination-free sealing of the hose.

According to an exemplifying embodiment, said method for mechanicalsealing of hollow hoses according to the above comprises the use of asealing means as described above.

The method may further comprise providing an appliance for sealing ofthe hollow hose, which appliance comprises two jaws, at least one of thejaws being movable towards and away from the other jaw and at least oneof the jaws having a bar which extends along a straight line and whichhas an end that projects towards the other jaw. Furthermore, one of thejaws of the appliance may be provided with a cutting means in the formof a substantially straight cutting edge, which projects to a greaterextent than said at least one bar. The method may further compriseplacing the hose, with the sealing means disposed thereon, between thetwo jaws. When an appliance as described above is used in the methodthis results in an indentation in the sealing means and the hose, whichforces the sealing means against the hose for sealing of the same, whileat the same time a fracture indication is provided in the sealing meansand in the hose.

According to an exemplifying embodiment, said method for mechanicalsealing of hollow hoses comprises the use of an appliance as describedabove with respect to a second aspect of the invention and a sealingmeans as described above with respect to a first aspect of theinvention.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will be described in more detail below for thepurpose of exemplification and with reference to the appended drawings,in which:

FIGS. 1 a-1 d illustrate schematically a sealing means according to theinvention and how this can be arranged around a hose to be sealed;

FIGS. 2 a-2 b show, in perspective and from above, respectively, a hosewith sealing means which is disposed in a crimping appliance;

FIGS. 3 a-3 b show, in perspective and from above, respectively, a hosewith sealing means which is disposed in an appliance at the final stageof sealing;

FIG. 4 is a side view of the sealed hose, partly cut-away, in a stateafter sealing;

FIGS. 5 a-5 b show an alternative embodiment of two sealing memberswhich form a sealing means, the sealing members being provided withpositioning means;

FIGS. 6 a-6 c show an alternative embodiment of two sealing memberswhich form a sealing means, the sealing members being provided withpositioning means according to an alternative embodiment;

FIGS. 7 a-7 b show an alternative embodiment of two sealing memberswhich form a sealing means, the sealing members being provided withpositioning means according to a further alternative embodiment; and

FIGS. 8 a-8 c show an alternative embodiment of one sealing member thatforms a sealing means.

DESCRIPTION OF EXEMPLIFYING EMBODIMENTS

FIG. 1 a illustrates an exemplifying embodiment of the present inventionin the form of a sealing means 20 consisting of two sealing members 4,4′, which in this embodiment have the form of two cylindrical sleeves.The sealing means 20 is intended, for instance, for mechanical sealing,in a contamination-free manner, of the hoses that extend between, forexample, process containers and the conveying means and collectingvessels which are connected thereto, so that the latter, after beingfilled with a medium from the process container, can be moved withoutany risk of contamination to a laboratory or the like for sampling oranalysis of the medium. The sealing means may, of course, also be usedin a number of other applications where the requirements for goodhygienic conditions and/or contamination-free surroundings and/orworking environment are more or less exacting.

The sleeves 4, 4′ each have an opening 40, 40′, which extends betweenthe short sides of each sleeve. As can be seen in FIG. 1 a, the sleeves4, 4′ are configured such that their joint cylindrical surface covers aportion that spans more than 360°, i.e. they do not consist of a singlecylinder which has been split, but of two separate, original cylinders,which each have had a portion cut away in order to form the opening.

The sleeves 4, 4′ need not have the same shape, which means that it isconceivable, for instance, that the cylindrical surface of the sleeve 4should have a greater extent than the cylindrical surface of the sleeve4′, as seen in the circumferential direction of the sleeves. It isimportant, however, that they together have an extent in thecircumferential direction such that, when disposed around a hose to besealed, they together span more than 360° in order to overlap eachother.

With reference to FIGS. 1 b-1 d, the sealing means 20 will be describedbelow when used for sealing of a hollow hose of elastic material, forexample rubber or plastic of the appropriate quality.

FIG. 1 b shows a hose 2 where a sleeve 4 has been disposed around a partof the circumference of the hose. The hose may be, for instance, a hosethat extends between a process vessel (not shown) and a collectingvessel (not shown). FIG. 1 c illustrates how a second sleeve 4′ isapplied to the hose. The sleeve 4′ is applied to a side of the hoselocated opposite the side on which the sleeve 4 has been applied. Thesleeves 4, 4′ are then moved to the position shown in FIG. 1 d, i.e.opposite one another and, thus, surrounding the hose. As can be seen inFIG. 1 d, the sleeves 4, 4′ overlap. This overlap is provided on bothsides of the openings 40, 40′ of the sleeves, as is best seen in FIG. 1c. By this is meant that the portion 54 that border the opening 40′ ofthe sleeve 4′ overlaps with the portion 55 of the sleeve 4 and theportion 54′ of the sleeve 4′, which is located opposite the portion 54,overlaps with the portion 55′ of the sleeve 4. After the sleeves 4, 4′have been applied to the hose 2 as described above, they may be crimpedagainst the hose for sealing of the same. One example of the hose andthe sleeves 4, 4′ after crimping is shown in FIG. 4.

The overlap between the sleeves 4, 4′ may vary. Yet to obtain asatisfactory sealing of the hollow hose 2 they should overlap each otherby a length that is not less than the material thickness of the sleeves.This means that the distance with which the portion 54 overlaps theportion 55 should be at least equal to the material thickness of thesleeves 4, 4′, which is true also for the distance with which theportion 54′ overlaps the portion 55′. The sleeves should not overlapeach other in such a manner that there is a layer, somewhere along thesleeve, where the sleeves overlap more than once.

An alternative embodiment of the sleeves of the sealing means 20 isshown in FIGS. 5 a and 5 b, which illustrate two sleeves 44, 44′. Thesleeves 44, 44′ are designed in substantially the same way as thesleeves 4, 4′, but have been provided with positioning means 45, 45′,which makes it easier for the user to position the sleeves with thedesired overlap around a hose 2. In this embodiment, the positioningmeans have the form of two portions 46, 46′, which extend slightlyoutwards from the cylindrical surface of the respective sleeves 44, 44′.These portions 46, 46′ have been created by cutting the cylindricalsurfaces of the respective sleeves and then bending the portions 46, 46′so that they extend outwards at an angle to the cylindrical surfaces. Inthe application shown in FIG. 5 b, this allows an edge portion 47, 47′of the other, opposite sleeve to be brought into abutment against saidbent portion. When an edge portion 47, 47′ is brought into abutmentagainst the bent edge 46, 46′, the sleeves can no longer be movedtowards each other any further and this serves as an indication to theuser that the sleeves are accurately positioned around the hose 2 (notshown in FIG. 5 b), i.e. that the sleeves are positioned with a desiredoverlap between the edge portions 54, 54′, 55, 55′ of the respectivesleeves.

A further alternative embodiment of the sleeves of the sealing means 20is shown in FIGS. 6 a-6 c, which illustrate two sleeves 64, 64′. Thesleeves 64, 64′ are designed in substantially the same way as thesleeves 4, 4′, 44, 44′, but have been provided with an alternativeembodiment of the positioning means, which makes it easier for the userto position the sleeves with the desired overlap around a hose 2. Inthis embodiment, the positioning means are in the form of a portion 66,which extends like a flap slightly inwards from the cylindrical surfaceof one of the sleeves 64. The portion 66 has been created by cuttingslots 67 in the cylindrical surface of said sleeve and then bending theportion 66 so that it extends inwards at an angle to the cylindricalsurface. In the application shown in perspective in FIG. 6 b and incross-section in FIG. 6 c, this allows a portion of the edge 68 of theother, opposite sleeve 64′ to be brought into abutment against said bentportion. When an edge portion 68 is brought into abutment against thebent edge 66, the sleeves can no longer be moved towards each other anyfurther and this serves as an indication to the user that the sleevesare accurately positioned around the hose 2 (not shown in FIGS. 6 b and6 c), i.e. that the sleeves are positioned with a desired overlapbetween the edge portions 54, 54′, 55, 55′ of the respective sleeves. Inaddition, the cooperation between the portion 66 and the edge portion 68contribute to fixing the sleeves in the desired relative positions oncethey have been positioned around a hose to be sealed. In the embodimentshown, only the sleeve 64 is provided with a positioning means 66, butit is possible to provide both sleeves 64, 64′ with positioning means66, so that an edge portion of both sleeves, when accurately positioned,is brought into abutment against a portion of the other sleeve.

A further alternative embodiment of the sleeves of the sealing means 20is shown in FIGS. 7 a and 7 b, which illustrate two sleeves 74, 74′. Thesleeves 74, 74′ are designed in substantially the same way as thesleeves 4, 4′, 44, 44′, 64, 64′, but have been provided with analternative embodiment of the positioning means, which makes it easierfor the user to position the sleeves with the desired overlap around ahose 2. In the embodiment shown in FIG. 7 a, the positioning means arein the form of a portion 76 of a first sleeve and a portion 76′ of asecond sleeve. These two portions are shaped such that the portion 76can be inserted in the portion 76′, thereby overlapping the latter. Thetwo portions 76, 76′ have been formed from the material of therespective sleeves not intended to be in contact with the hose to besealed by bending it in the desired manner. Thus, the portions 76, 76′are arranged at an edge portion of the cylindrical surface of therespective sleeves 74, 74′ in the vicinity of the longitudinal openingof the sleeve and radially outside the cylindrical surface of thesleeve.

In use one of the sleeves is suitably arranged around the hose to besealed and the other sleeve is then moved along the hose until thesleeves are located opposite each other with the portions 76, 76′engaging each other, as shown in the bottom illustration of FIG. 7 a.Owing to the design of the portions 76, 76′, the positioning means ofthe two sleeves are arranged in mutually overlapping manner and so arethe portions 54, 55 of the two sleeves when the two positioning means76, 76′ are brought into engagement with each other. This design of theportions 76, 76′ is such that the sleeves can only be separated fromeach other by moving them apart along the axial extension of the hoseand this also contributes to fixing the sleeves in the desired relativepositions once they have been positioned around a hose to be sealed.

According to a further alternative embodiment, as shown in FIG. 7 b,each sleeve is provided with two positioning means 76, 76′. The twopositioning means of a sleeve are arranged at the edge portions of thecylindrical surface of the sleeve, i.e. on a respective side of thelongitudinal opening of the sleeve. These sleeves and positioning meanshave the same general design as the one shown in FIG. 7 a.

A yet further alternative embodiment of the sealing means 20 isdisclosed in FIGS. 8 a-8 c. In this embodiment, the sealing means 20consists of one sealing member 84, which has the form of a cylindricalsleeve. The sleeve 84 has an opening 40, which extend between the shortsides of the sleeve. As can be seen in FIG. 8 a, the sleeve 84 isconfigured such that its cylindrical surface covers a portion that spansmore than 360°, e.g. 361°-390°. Hence, the portions 94, 95 which areprovided adjacent the opening 40 overlap each other when the sleeve isin an unaffected condition.

The sleeve 84 is made in an appropriate material that allows theportions 94, 95 adjacent the opening 40 to be bent away from each other,as is shown in FIG. 8 b. This allows the sleeve 84 to be positionedaround the hose 2 to be sealed. Once the sleeve has been positionedaround the hose, the sleeve 84 may return to its unbiased condition inwhich the portions 94, 95 are overlapping each other.

The dimensions of the sleeves 4, 4′; 44, 44′; 64, 64′; 74, 74′; 84 aredependent on the dimensions of the hose 2 to be sealed. However, owingto a certain inherent flexibility in the sleeves, they need not matchthe hose size exactly. Instead it is conceivable that the regular radiusof the sleeve should be smaller than that of the hose, as long as it ispossible to stretch the sleeve to enable application thereof to the hoseduring use.

The material thickness of the sleeves is dependent on the currentapplication, i.e. the material thickness is adapted to the rigidity ofthe hose and the strength of the sleeve to ensure that the sleeve isable to withstand the pressure from the hose which it is arranged toseal without being deformed, which might cause it to open. The materialthickness may suitably be in the range of 0.25-1 mm. The length of thesleeves is adapted to the coefficient of friction between the hose andthe sleeves to prevent the sleeve from falling off when it is crimpedagainst the hose. The length is preferably two or more multiples of thediameter of the hose 2, which in turn, for certain applications, is inthe range of 3-40 mm.

The sleeves may suitably be made of an appropriate plasticallydeformable material, e.g. plastic or metal, having suitable plasticproperties. Such metals may be, for instance, brass, titanium, copper,aluminium or alloys thereof.

An appliance for sealing, i.e. crimping of sealing means for hollowhoses according to one aspect of the present invention, is shown inFIGS. 2 a-3 b. The appliance itself 1 may have form of a hand-operatedpair of tongs 5 which has one fixed and one movable leg 6 and 7 and atleast two jaws 8 and 9, at least one of which is movable towards andaway from the other. When moving the jaws 8, 9 towards each other bymanually pressing the legs 6, 7 together and using a driving means 10,which will be described below, the sleeves 4, 4′; 44, 44′; 64, 64′; 74,74′; 84 are crimped against the hose 2, thereby tightly sealing thesame.

More specifically, as best seen in FIG. 2 b, at least one of the jaws 8or 9, in this case the jaw 8, has at least one bar 11 which projectstowards the other jaw 9 or 8, in this case the jaw 9. In theabove-described movement of the jaws 8, 9 towards each other, this bar11 makes a marked indentation 12 in the sleeves 4, 4′; 44, 44′; 64, 64′;74, 74′; 84 and in the hose 2. In the preferred embodiment, there areessentially two such bars 11, which are placed substantially in parallelat a distance from each other and extend substantially transversely ofthe longitudinal direction of the sleeves 4, 4′; 44, 44′; 64, 64′; 74,74′; 84. The bars are preferably straight and make two substantiallytransverse indentations 12 in the sleeves 4, 4′; 44, 44′; 64, 64′; 74,74′; 84 and in the hose 2 to reinforce the sealing thereof as well asthe fixing of the sleeves 4, 4′; 44, 44′; 64, 64′; 74, 74′; 84 on thehose 2. If desired and if suitable, there may, of course, be more thantwo such bars 11 or bars which are differently placed/formed on said jaw8.

Moreover, at least one of the jaws 8 or 9, also in this case the jaw 8,has a cutting means 13 projecting towards the other jaw 9 or 8. When thejaws 8, 9 are moving towards each other in the described manner, thiscutting means 13 makes a cutting indication 14 in the sleeves 4, 4′; 44,44′; 64, 64′; 74, 74′; 84 and in the hose 2 to allow the sleeve and thehose to be cut in a sealing manner.

In the embodiment shown, the cutting means 13 is preferably formed as asubstantially straight cutting edge 15. The cutting edge extendssubstantially transversely of the longitudinal direction of the sleeves4, 4′; 44, 44′; 64, 64′; 74, 74′; 84 and thus makes a substantiallytrans-verse cutting indication 14 in the sleeves 4, 4′; 44, 44′; 64,64′; 74, 74′; 84 and in the hose 2. The cutting edge 15 projects to agreater extent than the bars 11 and suitably cooperates with anopposite, straight recess 16 in the opposite jaw, in this case the jaw9. The depth, width and form of the recess 16 may vary, and the recessis suitably adapted to the form of the cutting edge 15 and to thequalities of the material of the hose 2 and the sleeves 4, 4′; 44, 44′;64, 64′; 74, 74′; 84. In certain applications, the recess 16 can, ifrequired or desired, be omitted.

Preferably, the cutting edge 15 is situated substantially halfwaybetween the bars 11, if they are two in number. If there are furtherbars 11, the cutting edge 15 is suitably placed halfway between twoadjacent bars, preferably the ones situated closest to the middle. In acertain application, it is, of course, also possible to place thecutting edge 15 outside or on one side of the bar or the bars 11.

The cutting indication 14 mentioned above is preferably such that thesleeves 4, 4′; 44, 44′; 64, 64′; 74, 74′; 84 and the hose 2 are not cutor broken directly when sealing by means of the appliance 1, but at anoptional point of time after that. Then the sleeves 4, 4′; 44, 44′; 64,64′; 74, 74′; 84 and the hose 2 are separated along the cuttingindication 14 by manual or mechanical bending back and forth, until thesleeves are divided by fatigue fracture. An example of a crimped but notyet cut hose 2 with sleeves 4, 4′; 44, 44′; 64, 64′; 74, 74′; 84 isshown in FIG. 4.

Naturally, nothing prevents the sleeves 4, 4′; 44, 44′; 64, 64′; 74,74′; 84 and the hose 2 from being separated along the cutting indication14 directly in connection with the actual sealing.

To fix the sleeves 4, 4′; 44, 44′; 64, 64′; 74, 74′; 84 and the hose 2in the intended position between the jaws 8 and 9 in the appliance 1when sealing, at least one of the jaws 8 or 9, in this case the jaw 9,has a fixture 17. The fixture fixes and supports the hose 2 and thesleeve 4 laterally, horizontally and vertically and can be formed in anoptional manner.

For practical and other reasons, in the disclosed and describedembodiment the bars 11 and the cutting edge 15 are arranged on one ofthe jaws 8 or 9, in this case the jaw 8, and the fixture 17 on theother, opposite jaw 9 or 8, in this case the jaw 9. The bars 11, thecutting edge 15 and the fixture 17 can be mounted on the associated jawwith the aid of suitable attachment means, which are not shown.Alternatively, one/some of or all these components can be made in onepiece with the associated jaw. In the shown case, the bars 11 and thecutting edge 15 are made in one piece with the associated jaw, whereasthe fixture 17 is mounted on the associated jaw.

In the preferred embodiment, the jaw 8 provided with the bars 11 and thecutting edge 15 suitably has the form of a die, which is fixedly mountedin the appliance 1 with the aid of attachment means (not shown). In acorresponding manner, the jaw 9 provided with the fixture 17 has theform of a punch. This punch is mounted in a slidable manner (not shown)in the appliance 1 and is actuatable by the previously mentioned drivingmeans 10. The driving means 10 suitably consists of a gear mechanismgenerally designated 18, which can be an eccentric mechanism or the likeand which is suitably connected to and actuatable by means of themovable leg 7 of the pair of tongs 5.

The invention is not, of course, limited to the embodiments which aredescribed above and shown in the drawings, and can be modified in manydifferent ways within the scope of protection according to the appendedclaims.

The sleeves 4, 4′; 44, 44′; 64, 64′; 74, 74′; 84 need not necessarilyhave the form of substantially cylindrical sleeves, but also othershapes are conceivable. It is possible, for example, to use sleeveswhich are oval, square, octagonal etc.

The positioning means adapted to ensure a desired overlap between thesleeves need not have the forms described above but may be provided inalternative ways. It is conceivable, for instance, to have other formsof flaps or lugs against which an edge portion of the second sleeve mayabut than the ones described above. It is also conceivable to havepositioning means of other designs, which are based on the same conceptas that shown in FIGS. 7 a and 7 b.

By varying the diameter and material thickness of the sealing means aswell as the design of the appliance that crimps the sealing means, theinventive idea can be used for hoses of varying diameter and materialthickness. This is an advantage, since different hoses are used fordifferent applications in which a contamination-free sealing isdesirable.

The appliance 1 does not, for example, need to be a manually operablepair of tongs, but it can alternatively be a separate tool or a toolwhich is included in a machine and driven electrically, pneumatically,hydraulically etc according to need and desire. The jaws 8, 9 with theassociated components (bars 11, cutting edge 15 and fixture 17) can beattached to the appliance 1 in a replaceable manner and match the sizeof the hose 2 and the sleeve 4, 4′; 44, 44′; 64, 64′; 74, 74′ and/or bemutually exchangeable.

In another embodiment, the cutting edge can be pivotally affixed to thetool and/or jaw. The tool or jaw and can have a slot in which thecutting edge can be moved so as to be in line with the jaw or extendingbeyond it so as to perform the cutting function as described above.

The length of the overlap of the sealing members can vary within arelatively large range. Factors that are of importance for determiningwhich overlap is desirable are, for example, that the sealing means mustbe easy for the user to mount and that they must provide an overlap thatis sufficiently large to ensure that a contamination-free seal isobtained. It is possible, for instance, to have the overlap vary betweena few degrees of an imaginary circle circumscribing the sealing meansand up to twice the material thickness of the hose to be sealed. Thematerial thickness of the hoses in certain types of applications maytypically be in the range of 0.5 to 5 mm.

1. A sealing member comprising a plastically deformable material formechanical sealing of hollow hoses of elastic material by an appliancehaving at least two jaws, at least one of which is movable towards andaway from the other and which, when moving towards each other, crimp thesealing member against the hose for contamination-tight sealing of thesame, wherein the sealing member is at least one sealing member whichhas two opposite ends and an opening that extends between said ends toallow the at least one sealing member to be slipped onto the hose to besealed.
 2. A sealing member of claim 1, wherein the sealing member isconfigured such that a portion of said sealing member overlaps acorresponding portion of said sealing member when said sealing member isarranged around the hose to be sealed.
 3. A sealing member according toclaim 1, wherein the sealing member being adapted such that the portionof the sealing member that borders the opening of said sealing memberoverlaps the corresponding portion that borders said opening when thesealing member is arranged around the hose to be sealed.
 4. A sealingmember according to claim 1 wherein a surface extending between a firstside and a second side of said opening of said sealing member spans361-390° of a circle circumscribing said sealing member when saidsealing member is arranged around the hose to be sealed.
 5. A sealingmember according to claim 1 wherein a surface extending between a firstside and a second side of said opening of said sealing member spans370-390° of a circle circumscribing said sealing member when saidsealing member is arranged around the hose to be sealed.
 6. A sealingmember according to claim 1, wherein the sealing member comprises atleast two sealing members, each of which has two opposite ends and anopening that extends between said ends to allow the sealing members tobe slipped onto the hose to be sealed, the sealing members being adaptedsuch that the portions of a first sealing member that border the openingof said sealing member overlap corresponding portions of a secondsealing member when the sealing members are arranged around the hose tobe sealed.
 7. A sealing member as claimed in claim 1, wherein thesealing member comprises at least two sealing members, each of which hastwo opposite ends and an opening that extends between said ends to allowthe sealing members to be slipped onto the hose to be sealed, thesealing members being adapted such that the portions of a first sealingmember that border the opening of said sealing member overlapcorresponding portions of a second sealing member when the sealingmembers are arranged around the hose to be sealed and wherein eachsealing member consists of a substantially cylindrical element withopposite ends and with an opening that extends between said ends toallow application to the hose.
 8. A sealing member as claimed in claim1, wherein the sealing member comprises at least two sealing members,each of which has two opposite ends and an opening that extends betweensaid ends to allow the sealing members to be slipped onto the hose to besealed, the sealing members being adapted such that the portions of afirst sealing member that border the opening of said sealing memberoverlap corresponding portions of a second sealing member when thesealing members are arranged around the hose to be sealed and wherein asurface extending between a first side and a second side of said openingof at least one of said sealing members spans 180-350° of a circlecircumscribing said sealing members.
 9. A sealing member as claimed inclaim 1, wherein the sealing member comprises at least two sealingmembers, each of which has two opposite ends and an opening that extendsbetween said ends to allow the sealing members to be slipped onto thehose to be sealed, the sealing members being adapted such that theportions of a first sealing member that border the opening of saidsealing member overlap corresponding portions of a second sealing memberwhen the sealing members are arranged around the hose to be sealed andwherein a surface extending between a first side and a second side ofsaid opening of at least one of said sealing members spans 230-270° of acircle circumscribing said sealing members.
 10. A sealing member ofclaim 1 wherein the sealing member comprises at least two sealingmembers, each of which has two opposite ends and an opening that extendsbetween said ends to allow the sealing members to be slipped onto thehose to be sealed, the sealing members being adapted such that theportions of a first sealing member that border the opening of saidsealing member overlap corresponding portions of a second sealing memberwhen the sealing members are arranged around the hose to be sealedwherein a surface extending between a first side and a second side ofsaid opening of each of said sealing members spans 180-350° of a circlecircumscribing said sealing members.
 11. A sealing member of claim 1wherein the sealing member comprises at least two sealing members, eachof which has two opposite ends and an opening that extends between saidends to allow the sealing members to be slipped onto the hose to besealed, the sealing members being adapted such that the portions of afirst sealing member that border the opening of said sealing memberoverlap corresponding portions of a second sealing member when thesealing members are arranged around the hose to be sealed and wherein asurface extending between a first side and a second side of said openingof each of said sealing members spans 230-270° of a circlecircumscribing said sealing members.
 12. A sealing member of claim 1wherein the sealing member comprises at least two sealing members, eachof which has two opposite ends and an opening that extends between saidends to allow the sealing members to be slipped onto the hose to besealed, the sealing members being adapted such that the portions of afirst sealing member that border the opening of said sealing memberoverlap corresponding portions of a second sealing member when thesealing members are arranged around the hose to be sealed and wherein atleast one of said sealing members is provided with positioning means forpositioning said sealing members at a desired position relative to oneanother when disposed around the hose to be sealed.
 13. A sealing memberof claim 11 wherein the sealing member comprises at least two sealingmembers, each of which has two opposite ends and an opening that extendsbetween said ends to allow the sealing members to be slipped onto thehose to be sealed, the sealing members being adapted such that theportions of a first sealing member that border the opening of saidsealing member overlap corresponding portions of a second sealing memberwhen the sealing members are arranged around the hose to be sealed andwherein at least one of said sealing members is provided with a bentportion, the bent portion extending outwards from the surface of thesealing member and being configured such that an edge around saidopening of said second sealing member abuts against said bent portionwhen said first and second sealing members are positioned with thedesired overlap around the hose to be sealed.
 14. A sealing member ofclaim 11 wherein the sealing member comprises at least two sealingmembers, each of which has two opposite ends and an opening that extendsbetween said ends to allow the sealing members to be slipped onto thehose to be sealed, the sealing members being adapted such that theportions of a first sealing member that border the opening of saidsealing member overlap corresponding portions of a second sealing memberwhen the sealing members are arranged around the hose to be sealed andwherein the sealing members are adapted such that said overlap betweenthe sealing members when disposed around the hose to be sealed, has alength that exceeds the material thickness of said sealing members. 15.A sealing member of claim 1 wherein the sealing member comprises atleast two sealing members, each of which has two opposite ends and anopening that extends between said ends to allow the sealing members tobe slipped onto the hose to be sealed, the sealing members being adaptedsuch that the portions of a first sealing member that border the openingof said sealing member overlap corresponding portions of a secondsealing member when the sealing members are arranged around the hose tobe sealed and, wherein said sealing members are adapted such that, whenarranged around said hollow hose, they are positioned relative to oneanother in such a manner that the portions of the first sealing memberthat border the opening of said sealing member overlap the correspondingportions of an adjacent sealing member, the overlap on the respectivesides of said opening having a length that exceeds the materialthickness of said sealing members.
 16. A kit for mechanical sealing ofhollow hoses of elastic material, the kit comprising a sealing member ofclaim 1 and an appliance having at least two jaws, at least one of whichis movable towards and away from the other and which, when movingtowards each other, crimp the sealing member against the hose forcontamination-tight sealing of the same, wherein at least one of thejaws of the appliance has at least one bar which projects towards theother jaw and which, when the jaws are moving towards each other, makesan indentation in the sealing member and the hose to reinforce thesealing thereof as well as the fixing of the sleeve on the hose, andwherein at least one of the jaws has a cutting means, which projectstowards the other jaw and which, when the jaws are moving towards eachother, makes a cutting indication in the sealing member and the hose toallow the hose to be cut in a sealing manner.
 17. A method formechanical sealing of hollow hoses by means of an appliance having atleast two jaws, at least one of which is movable towards and away fromeach other, comprising the steps of providing a sealing member made of aplastically deformable material, the sealing member comprising at leastone sealing member, which has two opposite ends and an opening thatextends between said ends; arranging the sealing member on the hose tobe sealed in such a manner that a portion of the sealing member overlapa corresponding portion of the sealing member; crimping the sealingmember against the hose by means of said appliance forcontamination-tight sealing.
 18. A method for mechanical sealing ofhollow hoses according to claim 14, further comprising providing asealing member comprising two sealing members, each of which has twoopposite ends and an opening that extends between said ends; arrangingthe respective sealing members on the hose to be sealed; positioning thesealing members around the hose such that the portions of a firstsealing member that border said opening overlap the respectivecorresponding portions of a second sealing member.
 19. A method formechanical sealing of hollow hoses as claimed in claim 15, wherein saidpositioning of said sealing members comprises positioning the sealingmembers such that an edge of one of said sealing members overlaps anedge of an adjacent sealing member by a length that exceeds the materialthickness of said sealing members.
 20. A method for mechanical sealingof hollow hoses of claim 17, wherein said sealing member is a sealingmember as claimed in claim 1.